kernel/drivers/misc/mei/Kconfig, branch linux-rolling-stable

mei: gsc: add dependency on Xe driver

2026-01-02T11:57:15Z

commit 5d92c3b41f0bddfa416130c6e1b424414f3d2acf upstream. INTEL_MEI_GSC depends on either i915 or Xe and can be present when either of above is present. Cc: stable Fixes: 87a4c85d3a3e ("drm/xe/gsc: add gsc device support") Tested-by: Baoli Zhang Signed-off-by: Junxiao Chang Signed-off-by: Alexander Usyskin Link: https://patch.msgid.link/20251109153533.3179787-1-alexander.usyskin@intel.com Signed-off-by: Greg Kroah-Hartman

mei: late_bind: add late binding component driver

2025-09-18T16:32:00Z

Introduce a new MEI client driver to support Late Binding firmware upload/update for Intel discrete graphics platforms. Late Binding is a runtime firmware upload/update mechanism that allows payloads, such as fan control and voltage regulator, to be securely delivered and applied without requiring SPI flash updates or system reboots. This driver enables the Xe graphics driver and other user-space tools to push such firmware blobs to the authentication firmware via the MEI interface. The driver handles authentication, versioning, and communication with the authentication firmware, which in turn coordinates with the PUnit/PCODE to apply the payload. This is a foundational component for enabling dynamic, secure, and re-entrant configuration updates on platforms like Battlemage. Cc: Badal Nilawar Reviewed-by: Mika Westerberg Signed-off-by: Badal Nilawar Reviewed-by: Anshuman Gupta Signed-off-by: Rodrigo Vivi Signed-off-by: Alexander Usyskin Reviewed-by: Lucas De Marchi Acked-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20250905154953.3974335-3-badal.nilawar@intel.com Signed-off-by: Lucas De Marchi

x86/cpu: Drop configuration options for early 64-bit CPUs

2025-02-27T10:19:06Z

The x86 CPU selection menu is confusing for a number of reasons: When configuring 32-bit kernels, it shows a small number of early 64-bit microarchitectures (K8, Core 2) but not the regular generic 64-bit target that is the normal default. There is no longer a reason to run 32-bit kernels on production 64-bit systems, so only actual 32-bit CPUs need to be shown here. When configuring 64-bit kernels, the options also pointless as there is no way to pick any CPU from the past 15 years, leaving GENERIC_CPU as the only sensible choice. Address both of the above by removing the obsolete options and making all 64-bit kernels run on both Intel and AMD CPUs from any generation. Testing generic 32-bit kernels on 64-bit hardware remains possible, just not building a 32-bit kernel that requires a 64-bit CPU. Signed-off-by: Arnd Bergmann Signed-off-by: Ingo Molnar Cc: Linus Torvalds Link: https://lore.kernel.org/r/20250226213714.4040853-5-arnd@kernel.org

mei: rework Kconfig dependencies

2023-12-15T16:02:15Z

The dependencies in the mei framework are inconsistent, with some symbols using 'select INTEL_MEI' to force it being enabled and others using 'depends on INTEL_MEI'. In general, one should not select user-visible symbols, so change all of these to normal dependencies, but change the default on INTEL_MEI to be enabled when building a kernel for an Intel CPU with ME or a generic x86 kernel. Having consistent dependencies makes the 'menuconfig' listing more readable by using proper indentation. A large if/endif block is just a simpler syntax than repeating the dependencies for each symbol. Signed-off-by: Arnd Bergmann Reviewed-by: Wentong Wu Link: https://lore.kernel.org/r/20231214183946.109124-2-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman

mei: fix vsc dependency

2023-12-15T16:01:41Z

CONFIG_INTEL_MEI_VSC_HW can be set to built-in even with CONFIG_MEI=m, but then the driver is not built because Kbuild never enters the drivers/misc/mei directory for built-in files, leading to a link failure: ERROR: modpost: "vsc_tp_reset" [drivers/misc/mei/mei-vsc.ko] undefined! ERROR: modpost: "vsc_tp_init" [drivers/misc/mei/mei-vsc.ko] undefined! ERROR: modpost: "vsc_tp_xfer" [drivers/misc/mei/mei-vsc.ko] undefined! ERROR: modpost: "vsc_tp_need_read" [drivers/misc/mei/mei-vsc.ko] undefined! ERROR: modpost: "vsc_tp_intr_enable" [drivers/misc/mei/mei-vsc.ko] undefined! ERROR: modpost: "vsc_tp_intr_synchronize" [drivers/misc/mei/mei-vsc.ko] undefined! ERROR: modpost: "vsc_tp_intr_disable" [drivers/misc/mei/mei-vsc.ko] undefined! ERROR: modpost: "vsc_tp_register_event_cb" [drivers/misc/mei/mei-vsc.ko] undefined! Add an explicit dependency on CONFIG_MEI that was apparently missing, to ensure the VSC_HW driver cannot be built-in with MEI itself being a loadable module. Fixes: 566f5ca97680 ("mei: Add transport driver for IVSC device") Signed-off-by: Arnd Bergmann Reviewed-by: Sakari Ailus Reviewed-by: Wentong Wu Link: https://lore.kernel.org/r/20231214183946.109124-1-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman

mei: Add MEI hardware support for IVSC device

2023-12-07T02:41:40Z

The protocol used for the IVSC device to communicate with HOST is MEI. The MEI hardware interfaces for the IVSC device are implemented. The APIs are exposed by MEI framework to mei clients, e.g. mei_csi and mei_ace. Signed-off-by: Wentong Wu Reviewed-by: Alexander Usyskin Reviewed-by: Sakari Ailus Tested-by: Hao Yao Acked-by: Tomas Winkler Link: https://lore.kernel.org/r/1701651344-20723-3-git-send-email-wentong.wu@intel.com Signed-off-by: Greg Kroah-Hartman

mei: Add transport driver for IVSC device

2023-12-07T02:41:40Z

The Intel visual sensing controller (IVSC) device is designed to control the camera sharing between host IPU for media usage and IVSC for context sensing (face detection). IVSC is exposed to HOST as an SPI device and the message protocol over the SPI BUS for communicating with the IVSC device is implemented. This is the backend of mei framework for IVSC device, which usually handles the hardware data transfer. The mei_csi and mei_ace are the clients of IVSC mei framework. The firmware downloading for the IVSC device is implemented as well. Signed-off-by: Wentong Wu Reviewed-by: Sakari Ailus Tested-by: Hao Yao Acked-by: Tomas Winkler Link: https://lore.kernel.org/r/1701651344-20723-2-git-send-email-wentong.wu@intel.com Signed-off-by: Greg Kroah-Hartman

mei: gsc_proxy: add gsc proxy driver

2023-05-04T09:57:29Z

Add GSC proxy driver. It to allows messaging between GSC component on Intel graphics card and CSE device. Cc: Alan Previn Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Daniele Ceraolo Spurio Acked-by: Greg Kroah-Hartman Reviewed-by: Alan Previn Link: https://patchwork.freedesktop.org/patch/msgid/20230502163854.317653-3-daniele.ceraolospurio@intel.com

mei: add support for graphics system controller (gsc) devices

2022-04-21T18:34:09Z

GSC is a graphics system controller, based on CSE, it provides a chassis controller for graphics discrete cards, as well as it supports media protection on selected devices. mei_gsc binds to a auxiliary devices exposed by Intel discrete driver i915. v2: fix error check in mei_gsc_probe v3: update MODULE_LICENSE ("GPL" is preferred over "GPL v2" and they both map to GPL version 2) Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Reviewed-by: Daniele Ceraolo Spurio Signed-off-by: Daniele Ceraolo Spurio Acked-by: Rodrigo Vivi #v3 Link: https://patchwork.freedesktop.org/patch/msgid/20220419193314.526966-3-daniele.ceraolospurio@intel.com

mei: pxp: export pavp client to me client bus

2021-10-04T17:10:17Z

Export PAVP client to work with i915 driver, for binding it uses kernel component framework. v2:drop debug prints, refactor match code to match mei_hdcp (Tomas) Signed-off-by: Vitaly Lubart Signed-off-by: Tomas Winkler Signed-off-by: Daniele Ceraolo Spurio Reviewed-by: Rodrigo Vivi Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20210924191452.1539378-3-alan.previn.teres.alexis@intel.com